This paper explores the realization of stress in Kubeo, a Tukanoan language from the Northwest Amazonia with both stress and tone (H vs. HL). The first H tone of a word docks on the primary stressed syllable, which by default is the second syllable except in words with lexical initial stress. Secondary stress occurs every two syllables to the right of the primary stress. F0, duration, intensity and the first two formants were measured for vowels in a corpus of 150 words ranging from one to six syllables. Results from two speakers indicate that primary stress is associated with the greatest duration and most peripheral vowel qualities. Unstressed pre-tonic syllables are phonetically more prominent than their post-tonic counterparts along all dimensions except F0, which depends on lexical tone. In post-tonic unstressed syllables, duration, intensity, and vowel quality are all dependent on lexical tone. Secondary stress is less salient due to interference from lexical tones but appears to be associated with longer duration and more peripheral vowels relative to unstressed syllables. Our results enrich typological knowledge of both the acoustic realization of stress in tone languages and the interplay of tonal and metrical phonology in languages with complex word level prosody.
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